CADXA

Central Arizona DX Association

K7UGA

August Meeting

We are the largest ham radio DX club in Arizona with over 120 members, many of whom are on the ARRL's DXCC Honor Roll.  We have several members who have traveled to distant places to put "rare" countries on the air.  We encourage any ham interested in DXing to join our club and learn about the many aspects of talking to hams around the globe who share this amazing hobby with us.  Founded in 1974, we are an ARRL-affiliated club and a member club of the Amateur Radio Council of Arizona (ARCA).

Our next meeting will be on Thursday night, August 3rd, at the PERA Club beginning at 7:00 pm.  The program will be “Meteor Scatter” presented by our own Tom Kramer, NQ7R.  Tom has been chasing meteors for several years and will discuss how this mode has evolved with new computer programs.  This is a fascinating mode that requires quick timing and has peak periods of activity around Earth’s meteor showers, one of which comes in August (Perseids will peak on the night of August 12-13).


Please feel free to arrive early to socialize with your friends.  Refreshments will be served at the break.  Guests are always welcome.

The July meeting featured Kristen McIntyre, K6WX, presenting “Ground is a Myth”.  Kristen has been hamming since her student days at MIT and has been very active as a DXer, net control, technical advisor, and club leader in the SF Bay area.  So many people, especially new hams, asked her about grounding for their stations that she developed this program, which she delivered to CADXA via the internet using TeamViewer. 


Kristen challenged a lot of our long-held assumptions about ground and presented some of her own ideas about how to most effectively protect a station from stray RF.  She had a lot of scientific evidence to support her theory that RF ground has its limitations and that the ground outside is usually a poor conductor at best when it comes to antennas.  However, as far as lightning protection, she is a believer. 


One message that certainly resonated with those attending was to use ferrites/toroids on every radio and computer cable to minimize both RFI and noise in the shack as a more effective approach than just tying everything to a common ground.

From DX Heat

From ARCA

President's Message

July Meeting Recap

We have great expectations now for two major DXpeditions in early 2018: 1) the well-publicized and very expensive one to Bouvet Island in the Antarctic and 2) one recently approved by U.S. Fish and Wildlife to Baker Island in the Pacific.  It has been a while since we have experienced big pile-ups on the bands, so it is nice to have some which we can begin to anticipate.  I need them both on RTTY, so I am excited that these two workable entities will be on the air again soon.


The last few weeks have seen the birth of a new digital mode in the Joe Taylor WSJT-X family, FT8.  It takes up much less bandwidth than JT65 and takes a quarter of the time to complete a QSO (90 seconds or less).  Although still in the Beta phase of development, it was used extensively by folks in the CQ VHF Contest for 6 meter QSOs this past weekend.  Download it and give it a try.  You will find it by scrolling down Joe’s web page https://physics.princeton.edu/pulsar/k1jt/wsjtx.html and looking for wsjtx 1.8.0-rc1.


The CADXA Scholarship awarded through the ARRL Foundation went to Sheldon B. Meyer, KG7SJB, of Scottsdale, Arizona.  Our club has sponsored this annual $1,000 scholarship for many years and we hope Sheldon makes good use of it in pursuing his higher education goals.


My tower is lowered to "half mast" for the summer monsoon season.  We have already seen a few wicked storms roll through Arizona this past week.  Make sure you are prepared for the wind and lightning to the extent possible.  Safety first!  


73,

Lee, KY7M

Welcome to the Central Arizona DX Association

Announced DX Operations
by NG3K

CADXA Repeater and Net
Join us on the K5VT repeater to announce and discuss DX.  In addition, there is a Thursday night net at 7:00 pm except on CADXA meeting nights.  The repeater and net are open to all DX enthusiasts.   
147.32 MHz (+) no PL tone

Courtesy of The Daily DX™

Current Solar Data

From WA7BNM